Push button lockout device base



FIG. 1 is a front isometric view of a push button lockout device base embodying our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a bottom plan view thereof.

The dash-dash broken line representations in the figures are for the purpose of illustrating unclaimed environment of the claimed design. 

CLAIM The ornamental design for a push button lockout device base, as shown and described. 